Desk-telephone apparatus.



N. PEDEBSEN.

DESK TELEPHONE APPARATUS.

APPLICATION FILED JUNE 4, 1909.

1,049,526, Patented Jan. 7, 1913.

2 SHEETS-SHEET 1.

N. PBDERSEN.

DESK TELEPHONE APPARATUS.

AIPLIOATION FILED JUNE 4, 1909 1,049,526. Patented Jan.7, 1913.

2 SHEETSSHEET 2.

' mil-mum I'LANKMILH'H CU.,\\'ASIIINGTON. n, c.

unrrn sin ES PATENT OFFICE.

NIELS PEDERSEN, 0F GENOA, ILLINOIS, ASSIGNOR T0 CRACRAFT-LEICH ELECTRIC COMPANY, OF GENOA, ILLINOIS, A CORPORATION OF ILLINOIS.

DESK-TELEPHONE APPARATUS.

Specification of Letters Patent.

Patented J an. 7 1913.

To all whom it may concern:

Be it known that I, NIELS PEDERSEN, a citizen of the United States, residing at Genoa, in the county of Genoa and State of Illinois, have invented a certain new and useful Improvement in Desk-Telephone Apther features which will be explained here inafter, which contemplate the removal of the switch-hook lever from the stem without removing any of the other parts, and consists furthermore in novel circuit-changingappliances which are mounted in the base and the standard of the desk telephone.

In a copending application Ser. #500,049, filed of even date herewith, I set forth the structure of a desk telephone which is similar to the structure herein, but in which copending application I confine my claims to the assembling features Whereas in the present application the claims are directed to the circuit changing features and devices of the desk telephone. This said co-pending application has in the meantime issued and bears the Patent 1911.

I will describe my invention more in de-- tall by reference to the accompanying drawings illustrating the preferred embodiment thereof, in which Figure 1 is a partial sectional vietw of a portable desk telephone; Fig. 2 is a bottom View thereof; and Fig. 3 is an enlarged sectional view on the lines A--A of Fig. 1; and Fig. 4 is a view on a smaller scale of the inclosure for the base.

Like characters of reference indicate like parts throughout the different figures.

My improved desk stand comprises a base portion 1, preferably of punched material, which is secured to the standard 2, through the interposition of the dished washer 3, by means of screws 4, 1. The screws 4, 4-, at the same time, in the base of the desk ,cuit-changing springs! #999,859, dated Aug. 8,

set screw into radially projecting arms 5, 6 and 7, which support the various desk set instrumentalities; for instance, radial arm 5 supporting induction coil 8, and radial arms 6 and 7 supporting a terminal or interconnecting plate, and the radial arm 6 at the same time supporting circuit-changing springs 10, 11, 12 and 13. These circuitchanging springs are all fastened, through the interposition of suitable insulating washers 14, upon a plate 15, which is secured to the radial arm 6 by means of the screws 16. Screws 1? are likewise mounted in these radial arms, and are adapted to engage a closure 18, having elongated holes 19, which elongated holes are of suflicient size at one extremity thereof to pass over the heads of the screws 17, after which the closure is rotated so as to bring these openings into a different position relative to these screws, whereby the closure is then held in place and the screws 17 fastened to secure same in position. A guard 20 is provided around the periphery of the closure to prevent marring of the furniture where the said port able telephone is to be used.

The circuit-changing springs, as stated, are mounted in the base, and one of said cir- (spring 12) is provided with a rubber roller 21, which is rotatable thereon, and which roller is adapted to be engaged by a plunger 22. When the plunger comes down, it engages the rubber roller, and thereby this master-spring 12 effects circuit-changing position of the other springs 10,11,12 and 13. When the plunger is in its uppermost position, shown in Fig. 1, the springs are in their normal condition. A leaf spring 23, fastened to the arm 7, presses upwardly against a collar 24, fastened to the plunger, and thus keeps the plunger normally in its uppermost position.

It will be seen from this construction that the interposition of the roller serves a most efficient connecting link between the plunger 22 and the springs, in that all sliding motion is limited to the shaft upon which the roller is mounted, and wear and tear is thus reduced to the minimum. The plunger 22, which thus effects the necessary circuit changes, is held in position by means of the central apertures through the base 1, and

the washer 25, into which the screws project. The plunger 15 likewise held in its uppermost position by a guide-plate 26, which is mounted in the standard 2. A portion of the round-plunger 22 is notched off at its uppermost portion, as shown mostclearly in Fig. 3, so that said plunger is prevented from rotating through the aperture which conforms 'to this upper outline of the plunger, which aperture is provided in the guide-plate 26, and through which the upper portion of the plunger.

projects.

The plunger 22, is engaged by the switching lever 27, which switch-hook lever is of the ordinary construction at its left hand extremity, where it is designed to support a hand telephone, which hand telephone has sufiicient weight to overcome the tension of the springs acting upwardly against the springs 22, when said hand telephone is placed in position upon said switch-hook lever, as is well understood. The other extremity of the switch-hook lever, however, is of novel construction. The switch-hook lever has two arms 28 at its right hand extremity, referring to Fig. 1, which project upon opposite sides of the fixedly mounted shaft 29, and about which shaft the switchhook lever may rotate in order to permit elevation and depression of the plunger 22. The shaft 29 is firmly secured in an angular plate 30, shown more clearly in Fig. 3, and which plate 30 is secured by means of screws to the standard 2.

The construction thus far described would, it will be seen, permit withdrawal and restoration of the switch-hook lever 27, there being nothing to hold it in fixed position upon its shaft. Now, in order to hold the switch-hook lever in its oscillatory position about the shaft 29, I provide a spring 31, which is fastened by means of the screws 32 to the standard 2, and which spring is adapted to enter a notch 33, provided in the upper portion of the switch-hook lever 27. A set screw 34 enters the standard from the opposite side to that at which the switchhook lever enters, and this screw is adapted to engage the top portion of the end of the .spring 31, thereby pressing it down into its proper position in the notch 33. When all parts are in this position, as is shown in Fig. 1, the switch-hook lever 27 is permitted to properly oscillate about the shaft 29, and to raise and depress the plunger 22, depending upon whether or not the hand telephone is or is not upon the switch-hook lever.

It is of great advantage to remove the switch-hook lever, for instance, when shipping or when taking the telephone to its place of installation, and it will be seen from this construction that the means for agency of the,

securing the lever in position permit of its front withdrawal without disarranging any .ofthe adjustment of the desk stand, merely by the release of the set screw 34, which permits the spring 31 to bend upwardly out of engagement with the notch 33, whereby the switch-hook lever may be withdrawn. When thereafter desired, the switch-hook lever may again be inserted in position with its arms about the shaft 29, and the set screw tightened up to force the spring 31 into engagement with the notch 33, which thereby secures the switch-hook lever in position and prevents its withdrawal.

In some of the claims I use the words separately mounted when referring to the switching springs or devices. By these words I means to designate that the springs are not mounted alongside the lever as in self-contained switch devices of the prior art, but are mounted away from the oscillatory mounting of the lever itself so that the springs can be properly accommodated somewhere in the telephone, as the said springs are of a length greater than could be accommodated transversely within the tubular standard.

While I have herein shown anddescribed the preferred embodiment of my invention, I do not limit myself to the precise construction and arrangement as herein set forth, but

Having thus described my invention, what I claim as new and desire to secure by Letters Patent of the United States is 1. A portable telephone having a base and a tubular standard, a switch-hook lever, switch-hook springs controlled thereby, a spring for pressing said lever into its uppermost position, means for mounting said lever to permit of its oscillatory motion, and means within the standard and operable from without the standard to lock said lever to its mounting means and to permit of its withdrawal from said standard.

2. A portable desk telephone having a standard and base, a switclrhook lever mounted in said standard, switching springs mounted in said base, a reciprocating plunger free at its lower end interposed between said springs and said switch-hook lever, and a guide through which said plunger reciprocates for preventing the rotation of said plunger.

3. A bank of circuit-changing springs including a master spring, having a roller mounted upon said master spring and a plunger movable transversely to said springs to actuate said roller-carrying spring.

4. A bank of circuit-changing springs including a master spring, having a roller mounted upon said master spring, and means movable transversely across the face of said springs for engaging said roller to actuate said springs.

5. A bank of circuit-changing springs including a master spring, means movable in a plane substantially parallel to said springs transversely thereof to actuate said master spring, and means mounted upon said master spring and interposed between said master spring and said first-aforesaid means to permit said actuation.

6. A portable desk telephone having a standard and base, a switch-hook lever mounted in said standard, switching springs including a master spring mounted in said base, a roller mounted on said master spring, and a reciprocating plunger movable transversely to said springs interposed between said roller and said switch-hook lever.

7. A portable desk telephone having a standard and base, a switch-hook lever mounted in said standard, horizontally mounted switching springs in vertical planes, including a master spring mounted in said base, a roller mounted on said master spring, and a reciprocating plunger interposed between said roller and said switch-hook lever.

8. A portable desk telephone having a standard and base, a switch-hook lever mounted in said standard, switching springs including a master spring mounted in said base, a reciprocating plunger interposed be tween said lever and said springs to operate same, and means provided upon one spring to cause the vertical movement of said plunger to cause a horizontal motion of one end of said spring.

9. A portable tesk telephone having a base and a tubular standard, a switch-hook lever held in place in said standard by means operable from the outside of said standard, in combination with switching springs and a plunger interposed between said lever and springs.

10. A portable desk telephone having a base and a tubular standard, a switch-hook lever held in place in said standard by means operable from the outside of said standard, in combination with switching springs and reciprocatory means interposed between said springs and said lever.

11. A portable telephone having a base and a tubular standard, a switchhook lever, switchhook springs controlled thereby, a spring for pressing said lever into its uppermost posit-ion, a mounting for said lever within the standard to permit of its oscillatory movement and a supplemental spring within the standard to hold said lever in place said supplemental spring being operable from without the standard so that said lever may be withdrawn from said standard.

12. A portable telephone having a base and a tubular standard, a switchhook lever, switchhook springs controlled thereby, a spring for pressing said lever into its uppermost position, a shaft about which said lever is rotatable. and a spring within the standard to hold said lever in its place on said shaft said last mentioned spring being operable from without the standards so that said leVIer may be withdrawn from said standarc.

13. A portable telephone having a base and a tubular standard, a switchhook lever, switchhook springs controlled thereby, a spring for pressing said lever into its uppermost position, a mounting for said lever within the standard to permit of its oscillatory movement and means within the standard and operable from without the standard to hold said lever in place and to permit of its withdrawal from said standard.

14. A portable telephone having a base and a tubular standard, a switchhook lever having a forked extremity for mounting purposes at one end, switchhook springs controlled thereby, a spring for pressing said lever into its uppermost position, a shaft within the standard for receiving said forked extremity aforesaid, and a spring for holding: said lever in place upon said shaft said last mentioned spring being operable from without the standard so that said lever may be withdrawn from said standard.

15. A portable telephone having a base and a tubular standard, a switchhook lever having a forked extremity for mounting purposes at one end, switchhook springs controlled thereby, a spring for pressing said lever into its uppermost position, a shaft within the standard for receiving said forked extremity aforesaid, and means operable from without the standard for holding said lever in place upon said shaft and to permit of its withdrawal from said standard.

16. A portable telephone having a base and a tubular standard, a switchhook lever having a forked extremity for mount-ing purposes at one end, switchhook springs controlled thereby, a spring for pressing said lever into its uppermost position, a shaft within the standard for receiving said forked extremity aforesaid, and a spring operable from without the standard for holding said lever in place upon said shaft whereby said lever may be withdrawn from the standard.

17. A portable telephone having a hook lover, a plunger actuated thereby, a lever movable transversely of and in accordance with the act-nations of said plunger, and circuit changing devices controlled by said last aforesaid lever.

In Witness whereof, I hereunto sub- 18. A portable telephone having a hook scribe my name this 6th day of May A. D.

lever, a plunger actuated thereby, a lever movable transversely of and operated by 1909.

said plunger, a roller interposed between NIELS PEDERSEN. said plunger and lever for guiding the free Witnesses:

end of said lever, and circuit changing de- 0. M. LEIGH,

J. H. WVAGENER.

Copies of this patent may be obtained for five cents each, by addressing the Washington, D. C.

vices controlledby said last aforesaid lever.

Commissioner of Patents, 

